diff options
-rw-r--r-- | Documentation/filesystems/ext4.txt | 8 | ||||
-rw-r--r-- | fs/ext4/balloc.c | 63 | ||||
-rw-r--r-- | fs/ext4/dir.c | 13 | ||||
-rw-r--r-- | fs/ext4/ext4.h | 34 | ||||
-rw-r--r-- | fs/ext4/ext4_extents.h | 4 | ||||
-rw-r--r-- | fs/ext4/ext4_jbd2.h | 128 | ||||
-rw-r--r-- | fs/ext4/extents.c | 330 | ||||
-rw-r--r-- | fs/ext4/fsync.c | 2 | ||||
-rw-r--r-- | fs/ext4/ialloc.c | 260 | ||||
-rw-r--r-- | fs/ext4/inode.c | 95 | ||||
-rw-r--r-- | fs/ext4/mballoc.c | 342 | ||||
-rw-r--r-- | fs/ext4/mballoc.h | 20 | ||||
-rw-r--r-- | fs/ext4/migrate.c | 2 | ||||
-rw-r--r-- | fs/ext4/mmp.c | 4 | ||||
-rw-r--r-- | fs/ext4/namei.c | 2 | ||||
-rw-r--r-- | fs/ext4/page-io.c | 18 | ||||
-rw-r--r-- | fs/ext4/resize.c | 37 | ||||
-rw-r--r-- | fs/ext4/super.c | 1075 | ||||
-rw-r--r-- | fs/ext4/xattr.c | 25 | ||||
-rw-r--r-- | fs/jbd2/checkpoint.c | 140 | ||||
-rw-r--r-- | fs/jbd2/commit.c | 47 | ||||
-rw-r--r-- | fs/jbd2/journal.c | 361 | ||||
-rw-r--r-- | fs/jbd2/recovery.c | 5 | ||||
-rw-r--r-- | fs/jbd2/revoke.c | 12 | ||||
-rw-r--r-- | fs/jbd2/transaction.c | 48 | ||||
-rw-r--r-- | include/linux/fs.h | 13 | ||||
-rw-r--r-- | include/linux/jbd2.h | 12 | ||||
-rw-r--r-- | include/linux/journal-head.h | 2 | ||||
-rw-r--r-- | include/trace/events/jbd2.h | 29 | ||||
-rw-r--r-- | mm/page-writeback.c | 2 |
30 files changed, 1522 insertions, 1611 deletions
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt index 8c10bf375c73..1b7f9acbcbbe 100644 --- a/Documentation/filesystems/ext4.txt +++ b/Documentation/filesystems/ext4.txt @@ -144,9 +144,6 @@ journal_async_commit Commit block can be written to disk without waiting mount the device. This will enable 'journal_checksum' internally. -journal=update Update the ext4 file system's journal to the current - format. - journal_dev=devnum When the external journal device's major/minor numbers have changed, this option allows the user to specify the new journal location. The journal device is @@ -356,11 +353,6 @@ nouid32 Disables 32-bit UIDs and GIDs. This is for interoperability with older kernels which only store and expect 16-bit values. -resize Allows to resize filesystem to the end of the last - existing block group, further resize has to be done - with resize2fs either online, or offline. It can be - used only with conjunction with remount. - block_validity This options allows to enables/disables the in-kernel noblock_validity facility for tracking filesystem metadata blocks within internal data structures. This allows multi- diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index f9e2cd8cf711..4bbd07a6fa18 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -336,10 +336,10 @@ err_out: * Return buffer_head on success or NULL in case of failure. */ struct buffer_head * -ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group) +ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group) { struct ext4_group_desc *desc; - struct buffer_head *bh = NULL; + struct buffer_head *bh; ext4_fsblk_t bitmap_blk; desc = ext4_get_group_desc(sb, block_group, NULL); @@ -348,9 +348,9 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group) bitmap_blk = ext4_block_bitmap(sb, desc); bh = sb_getblk(sb, bitmap_blk); if (unlikely(!bh)) { - ext4_error(sb, "Cannot read block bitmap - " - "block_group = %u, block_bitmap = %llu", - block_group, bitmap_blk); + ext4_error(sb, "Cannot get buffer for block bitmap - " + "block_group = %u, block_bitmap = %llu", + block_group, bitmap_blk); return NULL; } @@ -382,25 +382,50 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group) return bh; } /* - * submit the buffer_head for read. We can - * safely mark the bitmap as uptodate now. - * We do it here so the bitmap uptodate bit - * get set with buffer lock held. + * submit the buffer_head for reading */ + set_buffer_new(bh); trace_ext4_read_block_bitmap_load(sb, block_group); - set_bitmap_uptodate(bh); - if (bh_submit_read(bh) < 0) { - put_bh(bh); + bh->b_end_io = ext4_end_bitmap_read; + get_bh(bh); + submit_bh(READ, bh); + return bh; +} + +/* Returns 0 on success, 1 on error */ +int ext4_wait_block_bitmap(struct super_block *sb, ext4_group_t block_group, + struct buffer_head *bh) +{ + struct ext4_group_desc *desc; + + if (!buffer_new(bh)) + return 0; + desc = ext4_get_group_desc(sb, block_group, NULL); + if (!desc) + return 1; + wait_on_buffer(bh); + if (!buffer_uptodate(bh)) { ext4_error(sb, "Cannot read block bitmap - " - "block_group = %u, block_bitmap = %llu", - block_group, bitmap_blk); - return NULL; + "block_group = %u, block_bitmap = %llu", + block_group, (unsigned long long) bh->b_blocknr); + return 1; } + clear_buffer_new(bh); + /* Panic or remount fs read-only if block bitmap is invalid */ ext4_valid_block_bitmap(sb, desc, block_group, bh); - /* - * file system mounted not to panic on error, - * continue with corrupt bitmap - */ + return 0; +} + +struct buffer_head * +ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group) +{ + struct buffer_head *bh; + + bh = ext4_read_block_bitmap_nowait(sb, block_group); + if (ext4_wait_block_bitmap(sb, block_group, bh)) { + put_bh(bh); + return NULL; + } return bh; } diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 164c56092e58..ad56866d729a 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -91,17 +91,17 @@ int __ext4_check_dir_entry(const char *function, unsigned int line, return 0; if (filp) - ext4_error_file(filp, function, line, bh ? bh->b_blocknr : 0, + ext4_error_file(filp, function, line, bh->b_blocknr, "bad entry in directory: %s - offset=%u(%u), " "inode=%u, rec_len=%d, name_len=%d", - error_msg, (unsigned) (offset%bh->b_size), + error_msg, (unsigned) (offset % bh->b_size), offset, le32_to_cpu(de->inode), rlen, de->name_len); else - ext4_error_inode(dir, function, line, bh ? bh->b_blocknr : 0, + ext4_error_inode(dir, function, line, bh->b_blocknr, "bad entry in directory: %s - offset=%u(%u), " "inode=%u, rec_len=%d, name_len=%d", - error_msg, (unsigned) (offset%bh->b_size), + error_msg, (unsigned) (offset % bh->b_size), offset, le32_to_cpu(de->inode), rlen, de->name_len); @@ -425,8 +425,9 @@ static int call_filldir(struct file *filp, void *dirent, sb = inode->i_sb; if (!fname) { - printk(KERN_ERR "EXT4-fs: call_filldir: called with " - "null fname?!?\n"); + ext4_msg(sb, KERN_ERR, "%s:%d: inode #%lu: comm %s: " + "called with null fname?!?", __func__, __LINE__, + inode->i_ino, current->comm); return 0; } curr_pos = hash2pos(fname->hash, fname->minor_hash); diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 513004fc3d84..ded731ac8a32 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -53,7 +53,7 @@ printk(KERN_DEBUG f, ## a); \ } while (0) #else -#define ext4_debug(f, a...) do {} while (0) +#define ext4_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif #define EXT4_ERROR_INODE(inode, fmt, a...) \ @@ -184,6 +184,8 @@ struct mpage_da_data { #define EXT4_IO_END_UNWRITTEN 0x0001 #define EXT4_IO_END_ERROR 0x0002 #define EXT4_IO_END_QUEUED 0x0004 +#define EXT4_IO_END_DIRECT 0x0008 +#define EXT4_IO_END_IN_FSYNC 0x0010 struct ext4_io_page { struct page *p_page; @@ -192,18 +194,25 @@ struct ext4_io_page { #define MAX_IO_PAGES 128 +/* + * For converting uninitialized extents on a work queue. + * + * 'page' is only used from the writepage() path; 'pages' is only used for + * buffered writes; they are used to keep page references until conversion + * takes place. For AIO/DIO, neither field is filled in. + */ typedef struct ext4_io_end { struct list_head list; /* per-file finished IO list */ struct inode *inode; /* file being written to */ unsigned int flag; /* unwritten or not */ - struct page *page; /* page struct for buffer write */ + struct page *page; /* for writepage() path */ loff_t offset; /* offset in the file */ ssize_t size; /* size of the extent */ struct work_struct work; /* data work queue */ struct kiocb *iocb; /* iocb struct for AIO */ int result; /* error value for AIO */ - int num_io_pages; - struct ext4_io_page *pages[MAX_IO_PAGES]; + int num_io_pages; /* for writepages() */ + struct ext4_io_page *pages[MAX_IO_PAGES]; /* for writepages() */ } ext4_io_end_t; struct ext4_io_submit { @@ -923,6 +932,7 @@ struct ext4_inode_info { #define EXT4_MOUNT_ERRORS_CONT 0x00010 /* Continue on errors */ #define EXT4_MOUNT_ERRORS_RO 0x00020 /* Remount fs ro on errors */ #define EXT4_MOUNT_ERRORS_PANIC 0x00040 /* Panic on errors */ +#define EXT4_MOUNT_ERRORS_MASK 0x00070 #define EXT4_MOUNT_MINIX_DF 0x00080 /* Mimics the Minix statfs */ #define EXT4_MOUNT_NOLOAD 0x00100 /* Don't use existing journal*/ #define EXT4_MOUNT_DATA_FLAGS 0x00C00 /* Mode for data writes: */ @@ -941,7 +951,6 @@ struct ext4_inode_info { #define EXT4_MOUNT_DIOREAD_NOLOCK 0x400000 /* Enable support for dio read nolocking */ #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ -#define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ #define EXT4_MOUNT_MBLK_IO_SUBMIT 0x4000000 /* multi-block io submits */ #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ @@ -1142,6 +1151,7 @@ struct ext4_sb_info { unsigned int s_mount_opt; unsigned int s_mount_opt2; unsigned int s_mount_flags; + unsigned int s_def_mount_opt; ext4_fsblk_t s_sb_block; uid_t s_resuid; gid_t s_resgid; @@ -1420,8 +1430,9 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 #define EXT4_FEATURE_INCOMPAT_EA_INODE 0x0400 /* EA in inode */ #define EXT4_FEATURE_INCOMPAT_DIRDATA 0x1000 /* data in dirent */ -#define EXT4_FEATURE_INCOMPAT_INLINEDATA 0x2000 /* data in inode */ +#define EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM 0x2000 /* use crc32c for bg */ #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ +#define EXT4_FEATURE_INCOMPAT_INLINEDATA 0x8000 /* data in inode */ #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ @@ -1794,8 +1805,14 @@ extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, ext4_group_t block_group, struct buffer_head ** bh); extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); -struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, - ext4_group_t block_group); + +extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb, + ext4_group_t block_group); +extern int ext4_wait_block_bitmap(struct super_block *sb, + ext4_group_t block_group, + struct buffer_head *bh); +extern struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, + ext4_group_t block_group); extern void ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh, ext4_group_t group, @@ -1841,6 +1858,7 @@ extern void ext4_check_inodes_bitmap(struct super_block *); extern void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap); extern int ext4_init_inode_table(struct super_block *sb, ext4_group_t group, int barrier); +extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); /* mballoc.c */ extern long ext4_mb_stats; diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h index a52db3a69a30..0f58b86e3a02 100644 --- a/fs/ext4/ext4_extents.h +++ b/fs/ext4/ext4_extents.h @@ -47,9 +47,9 @@ */ #define EXT_DEBUG__ #ifdef EXT_DEBUG -#define ext_debug(a...) printk(a) +#define ext_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) #else -#define ext_debug(a...) +#define ext_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif /* diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h index 5802fa1dab18..83b20fcf9400 100644 --- a/fs/ext4/ext4_jbd2.h +++ b/fs/ext4/ext4_jbd2.h @@ -104,6 +104,78 @@ #define EXT4_MAXQUOTAS_INIT_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_INIT_BLOCKS(sb)) #define EXT4_MAXQUOTAS_DEL_BLOCKS(sb) (MAXQUOTAS*EXT4_QUOTA_DEL_BLOCKS(sb)) +/** + * struct ext4_journal_cb_entry - Base structure for callback information. + * + * This struct is a 'seed' structure for a using with your own callback + * structs. If you are using callbacks you must allocate one of these + * or another struct of your own definition which has this struct + * as it's first element and pass it to ext4_journal_callback_add(). + */ +struct ext4_journal_cb_entry { + /* list information for other callbacks attached to the same handle */ + struct list_head jce_list; + + /* Function to call with this callback structure */ + void (*jce_func)(struct super_block *sb, + struct ext4_journal_cb_entry *jce, int error); + + /* user data goes here */ +}; + +/** + * ext4_journal_callback_add: add a function to call after transaction commit + * @handle: active journal transaction handle to register callback on + * @func: callback function to call after the transaction has committed: + * @sb: superblock of current filesystem for transaction + * @jce: returned journal callback data + * @rc: journal state at commit (0 = transaction committed properly) + * @jce: journal callback data (internal and function private data struct) + * + * The registered function will be called in the context of the journal thread + * after the transaction for which the handle was created has completed. + * + * No locks are held when the callback function is called, so it is safe to + * call blocking functions from within the callback, but the callback should + * not block or run for too long, or the filesystem will be blocked waiting for + * the next transaction to commit. No journaling functions can be used, or + * there is a risk of deadlock. + * + * There is no guaranteed calling order of multiple registered callbacks on + * the same transaction. + */ +static inline void ext4_journal_callback_add(handle_t *handle, + void (*func)(struct super_block *sb, + struct ext4_journal_cb_entry *jce, + int rc), + struct ext4_journal_cb_entry *jce) +{ + struct ext4_sb_info *sbi = + EXT4_SB(handle->h_transaction->t_journal->j_private); + + /* Add the jce to transaction's private list */ + jce->jce_func = func; + spin_lock(&sbi->s_md_lock); + list_add_tail(&jce->jce_list, &handle->h_transaction->t_private_list); + spin_unlock(&sbi->s_md_lock); +} + +/** + * ext4_journal_callback_del: delete a registered callback + * @handle: active journal transaction handle on which callback was registered + * @jce: registered journal callback entry to unregister + */ +static inline void ext4_journal_callback_del(handle_t *handle, + struct ext4_journal_cb_entry *jce) +{ + struct ext4_sb_info *sbi = + EXT4_SB(handle->h_transaction->t_journal->j_private); + + spin_lock(&sbi->s_md_lock); + list_del_init(&jce->jce_list); + spin_unlock(&sbi->s_md_lock); +} + int ext4_mark_iloc_dirty(handle_t *handle, struct inode *inode, @@ -261,43 +333,45 @@ static inline void ext4_update_inode_fsync_trans(handle_t *handle, /* super.c */ int ext4_force_commit(struct super_block *sb); -static inline int ext4_should_journal_data(struct inode *inode) +/* + * Ext4 inode journal modes + */ +#define EXT4_INODE_JOURNAL_DATA_MODE 0x01 /* journal data mode */ +#define EXT4_INODE_ORDERED_DATA_MODE 0x02 /* ordered data mode */ +#define EXT4_INODE_WRITEBACK_DATA_MODE 0x04 /* writeback data mode */ + +static inline int ext4_inode_journal_mode(struct inode *inode) { if (EXT4_JOURNAL(inode) == NULL) - return 0; - if (!S_ISREG(inode->i_mode)) - return 1; - if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) - return 1; - if (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA)) - return 1; - return 0; + return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ + /* We do not support data journalling with delayed allocation */ + if (!S_ISREG(inode->i_mode) || + test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) + return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ + if (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA) && + !test_opt(inode->i_sb, DELALLOC)) + return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */ + if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) + return EXT4_INODE_ORDERED_DATA_MODE; /* ordered */ + if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) + return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */ + else + BUG(); +} + +static inline int ext4_should_journal_data(struct inode *inode) +{ + return ext4_inode_journal_mode(inode) & EXT4_INODE_JOURNAL_DATA_MODE; } static inline int ext4_should_order_data(struct inode *inode) { - if (EXT4_JOURNAL(inode) == NULL) - return 0; - if (!S_ISREG(inode->i_mode)) - return 0; - if (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA)) - return 0; - if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) - return 1; - return 0; + return ext4_inode_journal_mode(inode) & EXT4_INODE_ORDERED_DATA_MODE; } static inline int ext4_should_writeback_data(struct inode *inode) { - if (EXT4_JOURNAL(inode) == NULL) - return 1; - if (!S_ISREG(inode->i_mode)) - return 0; - if (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA)) - return 0; - if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) - return 1; - return 0; + return ext4_inode_journal_mode(inode) & EXT4_INODE_WRITEBACK_DATA_MODE; } /* diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 74f23c292e1b..1421938e6792 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -44,6 +44,14 @@ #include <trace/events/ext4.h> +/* + * used by extent splitting. + */ +#define EXT4_EXT_MAY_ZEROOUT 0x1 /* safe to zeroout if split fails \ + due to ENOSPC */ +#define EXT4_EXT_MARK_UNINIT1 0x2 /* mark first half uninitialized */ +#define EXT4_EXT_MARK_UNINIT2 0x4 /* mark second half uninitialized */ + static int ext4_split_extent(handle_t *handle, struct inode *inode, struct ext4_ext_path *path, @@ -51,6 +59,13 @@ static int ext4_split_extent(handle_t *handle, int split_flag, int flags); +static int ext4_split_extent_at(handle_t *handle, + struct inode *inode, + struct ext4_ext_path *path, + ext4_lblk_t split, + int split_flag, + int flags); + static int ext4_ext_truncate_extend_restart(handle_t *handle, struct inode *inode, int needed) @@ -300,6 +315,8 @@ static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext) ext4_fsblk_t block = ext4_ext_pblock(ext); int len = ext4_ext_get_actual_len(ext); + if (len == 0) + return 0; return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, len); } @@ -2308,7 +2325,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode, struct ext4_extent *ex; /* the header must be checked already in ext4_ext_remove_space() */ - ext_debug("truncate since %u in leaf\n", start); + ext_debug("truncate since %u in leaf to %u\n", start, end); if (!path[depth].p_hdr) path[depth].p_hdr = ext_block_hdr(path[depth].p_bh); eh = path[depth].p_hdr; @@ -2343,14 +2360,17 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode, ext_debug(" border %u:%u\n", a, b); /* If this extent is beyond the end of the hole, skip it */ - if (end <= ex_ee_block) { + if (end < ex_ee_block) { ex--; ex_ee_block = le32_to_cpu(ex->ee_block); ex_ee_len = ext4_ext_get_actual_len(ex); continue; } else if (b != ex_ee_block + ex_ee_len - 1) { - EXT4_ERROR_INODE(inode," bad truncate %u:%u\n", - start, end); + EXT4_ERROR_INODE(inode, + "can not handle truncate %u:%u " + "on extent %u:%u", + start, end, ex_ee_block, + ex_ee_block + ex_ee_len - 1); err = -EIO; goto out; } else if (a != ex_ee_block) { @@ -2482,7 +2502,8 @@ ext4_ext_more_to_rm(struct ext4_ext_path *path) return 1; } -static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start) +static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, + ext4_lblk_t end) { struct super_block *sb = inode->i_sb; int depth = ext_depth(inode); @@ -2491,7 +2512,7 @@ static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start) handle_t *handle; int i, err; - ext_debug("truncate since %u\n", start); + ext_debug("truncate since %u to %u\n", start, end); /* probably first extent we're gonna free will be last in block */ handle = ext4_journal_start(inode, depth + 1); @@ -2504,6 +2525,61 @@ again: trace_ext4_ext_remove_space(inode, start, depth); /* + * Check if we are removing extents inside the extent tree. If that + * is the case, we are going to punch a hole inside the extent tree + * so we have to check whether we need to split the extent covering + * the last block to remove so we can easily remove the part of it + * in ext4_ext_rm_leaf(). + */ + if (end < EXT_MAX_BLOCKS - 1) { + struct ext4_extent *ex; + ext4_lblk_t ee_block; + + /* find extent for this block */ + path = ext4_ext_find_extent(inode, end, NULL); + if (IS_ERR(path)) { + ext4_journal_stop(handle); + return PTR_ERR(path); + } + depth = ext_depth(inode); + ex = path[depth].p_ext; + if (!ex) + goto cont; + + ee_block = le32_to_cpu(ex->ee_block); + + /* + * See if the last block is inside the extent, if so split + * the extent at 'end' block so we can easily remove the + * tail of the first part of the split extent in + * ext4_ext_rm_leaf(). + */ + if (end >= ee_block && + end < ee_block + ext4_ext_get_actual_len(ex) - 1) { + int split_flag = 0; + + if (ext4_ext_is_uninitialized(ex)) + split_flag = EXT4_EXT_MARK_UNINIT1 | + EXT4_EXT_MARK_UNINIT2; + + /* + * Split the extent in two so that 'end' is the last + * block in the first new extent + */ + err = ext4_split_extent_at(handle, inode, path, + end + 1, split_flag, + EXT4_GET_BLOCKS_PRE_IO | + EXT4_GET_BLOCKS_PUNCH_OUT_EXT); + + if (err < 0) + goto out; + } + ext4_ext_drop_refs(path); + kfree(path); + } +cont: + + /* * We start scanning from right side, freeing all the blocks * after i_size and walking into the tree depth-wise. */ @@ -2515,6 +2591,7 @@ again: } path[0].p_depth = depth; path[0].p_hdr = ext_inode_hdr(inode); + if (ext4_ext_check(inode, path[0].p_hdr, depth)) { err = -EIO; goto out; @@ -2526,7 +2603,7 @@ again: /* this is leaf block */ err = ext4_ext_rm_leaf(handle, inode, path, &partial_cluster, start, - EXT_MAX_BLOCKS - 1); + end); /* root level has p_bh == NULL, brelse() eats this */ brelse(path[i].p_bh); path[i].p_bh = NULL; @@ -2651,17 +2728,17 @@ void ext4_ext_init(struct super_block *sb) if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { #if defined(AGGRESSIVE_TEST) || defined(CHECK_BINSEARCH) || defined(EXTENTS_STATS) - printk(KERN_INFO "EXT4-fs: file extents enabled"); + printk(KERN_INFO "EXT4-fs: file extents enabled" #ifdef AGGRESSIVE_TEST - printk(", aggressive tests"); + ", aggressive tests" #endif #ifdef CHECK_BINSEARCH - printk(", check binsearch"); + ", check binsearch" #endif #ifdef EXTENTS_STATS - printk(", stats"); + ", stats" #endif - printk("\n"); + "\n"); #endif #ifdef EXTENTS_STATS spin_lock_init(&EXT4_SB(sb)->s_ext_stats_lock); @@ -2709,14 +2786,6 @@ static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex) } /* - * used by extent splitting. - */ -#define EXT4_EXT_MAY_ZEROOUT 0x1 /* safe to zeroout if split fails \ - due to ENOSPC */ -#define EXT4_EXT_MARK_UNINIT1 0x2 /* mark first half uninitialized */ -#define EXT4_EXT_MARK_UNINIT2 0x4 /* mark second half uninitialized */ - -/* * ext4_split_extent_at() splits an extent at given block. * * @handle: the journal handle @@ -3224,11 +3293,13 @@ static int check_eofblocks_fl(handle_t *handle, struct inode *inode, depth = ext_depth(inode); eh = path[depth].p_hdr; - if (unlikely(!eh->eh_entries)) { - EXT4_ERROR_INODE(inode, "eh->eh_entries == 0 and " - "EOFBLOCKS_FL set"); - return -EIO; - } + /* + * We're going to remove EOFBLOCKS_FL entirely in future so we + * do not care for this case anymore. Simply remove the flag + * if there are no extents. + */ + if (unlikely(!eh->eh_entries)) + goto out; last_ex = EXT_LAST_EXTENT(eh); /* * We should clear the EOFBLOCKS_FL flag if we are writing the @@ -3252,6 +3323,7 @@ static int check_eofblocks_fl(handle_t *handle, struct inode *inode, for (i = depth-1; i >= 0; i--) if (path[i].p_idx != EXT_LAST_INDEX(path[i].p_hdr)) return 0; +out: ext4_clear_inode_flag(inode, EXT4_INODE_EOFBLOCKS); return ext4_mark_inode_dirty(handle, inode); } @@ -3710,8 +3782,6 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, int free_on_err = 0, err = 0, depth, ret; unsigned int allocated = 0, offset = 0; unsigned int allocated_clusters = 0; - unsigned int punched_out = 0; - unsigned int result = 0; struct ext4_allocation_request ar; ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio; ext4_lblk_t cluster_offset; @@ -3721,8 +3791,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags); /* check in cache */ - if (!(flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) && - ext4_ext_in_cache(inode, map->m_lblk, &newex)) { + if (ext4_ext_in_cache(inode, map->m_lblk, &newex)) { if (!newex.ee_start_lo && !newex.ee_start_hi) { if ((sbi->s_cluster_ratio > 1) && ext4_find_delalloc_cluster(inode, map->m_lblk, 0)) @@ -3790,113 +3859,25 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, /* if found extent covers block, simply return it */ if (in_range(map->m_lblk, ee_block, ee_len)) { - struct ext4_map_blocks punch_map; - ext4_fsblk_t partial_cluster = 0; - newblock = map->m_lblk - ee_block + ee_start; /* number of remaining blocks in the extent */ allocated = ee_len - (map->m_lblk - ee_block); ext_debug("%u fit into %u:%d -> %llu\n", map->m_lblk, ee_block, ee_len, newblock); - if ((flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) == 0) { - /* - * Do not put uninitialized extent - * in the cache - */ - if (!ext4_ext_is_uninitialized(ex)) { - ext4_ext_put_in_cache(inode, ee_block, - ee_len, ee_start); - goto out; - } - ret = ext4_ext_handle_uninitialized_extents( - handle, inode, map, path, flags, - allocated, newblock); - return ret; - } - - /* - * Punch out the map length, but only to the - * end of the extent - */ - punched_out = allocated < map->m_len ? - allocated : map->m_len; - /* - * Sense extents need to be converted to - * uninitialized, they must fit in an - * uninitialized extent + * Do not put uninitialized extent + * in the cache */ - if (punched_out > EXT_UNINIT_MAX_LEN) - punched_out = EXT_UNINIT_MAX_LEN; - - punch_map.m_lblk = map->m_lblk; - punch_map.m_pblk = newblock; - punch_map.m_len = punched_out; - punch_map.m_flags = 0; - - /* Check to see if the extent needs to be split */ - if (punch_map.m_len != ee_len || - punch_map.m_lblk != ee_block) { - - ret = ext4_split_extent(handle, inode, - path, &punch_map, 0, - EXT4_GET_BLOCKS_PUNCH_OUT_EXT | - EXT4_GET_BLOCKS_PRE_IO); - - if (ret < 0) { - err = ret; - goto out2; - } - /* - * find extent for the block at - * the start of the hole - */ - ext4_ext_drop_refs(path); - kfree(path); - - path = ext4_ext_find_extent(inode, - map->m_lblk, NULL); - if (IS_ERR(path)) { - err = PTR_ERR(path); - path = NULL; - goto out2; - } - - depth = ext_depth(inode); - ex = path[depth].p_ext; - ee_len = ext4_ext_get_actual_len(ex); - ee_block = le32_to_cpu(ex->ee_block); - ee_start = ext4_ext_pblock(ex); - - } - - ext4_ext_mark_uninitialized(ex); - - ext4_ext_invalidate_cache(inode); - - err = ext4_ext_rm_leaf(handle, inode, path, - &partial_cluster, map->m_lblk, - map->m_lblk + punched_out); - - if (!err && path->p_hdr->eh_entries == 0) { - /* - * Punch hole freed all of this sub tree, - * so we need to correct eh_depth - */ - err = ext4_ext_get_access(handle, inode, path); - if (err == 0) { - ext_inode_hdr(inode)->eh_depth = 0; - ext_inode_hdr(inode)->eh_max = - cpu_to_le16(ext4_ext_space_root( - inode, 0)); - - err = ext4_ext_dirty( - handle, inode, path); - } + if (!ext4_ext_is_uninitialized(ex)) { + ext4_ext_put_in_cache(inode, ee_block, + ee_len, ee_start); + goto out; } - - goto out2; + ret = ext4_ext_handle_uninitialized_extents( + handle, inode, map, path, flags, + allocated, newblock); + return ret; } } @@ -4165,13 +4146,11 @@ out2: ext4_ext_drop_refs(path); kfree(path); } - result = (flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) ? - punched_out : allocated; trace_ext4_ext_map_blocks_exit(inode, map->m_lblk, - newblock, map->m_len, err ? err : result); + newblock, map->m_len, err ? err : allocated); - return err ? err : result; + return err ? err : allocated; } void ext4_ext_truncate(struct inode *inode) @@ -4228,7 +4207,7 @@ void ext4_ext_truncate(struct inode *inode) |